SOLVED: Multitrack Audio Track Names Missing

[PoizenJam]

I have a bunch of multi-track audio files I've created and stored on Jellyfin. ffmpeg code in Python looks like-

Code:

    # Convert to 1080p60
    subprocess.run(
        ["ffmpeg",
        '-hwaccel', 'cuda',  # Enable CUDA hardware acceleration
        '-i', input_file,
        '-n',
        '-c:v', 'h264_nvenc',
        '-preset', 'slow',
        '-b:v', '4.2M',
        "-c:a", "copy",  # Copy all audio streams
        "-vf", "scale=1920:-2",
        '-map', '0:v:0',

        # Map all audio streams
        '-map', '0:a:0',  # Map the first audio stream
        '-map', '0:a:1',  # Map the second audio stream
        '-map', '0:a:2',  # Map the third audio stream
        '-map', '0:a:3',  # Map the fourth audio stream
       
        # Add metadata for each audio track
        '-metadata:s:a:0', 'title=Clean (Backing + Bass)',  # Title for the first audio track
        '-metadata:s:a:1', 'title=Original (Stream Audio)',  # Title for the second audio track
        '-metadata:s:a:2', 'title=Voice (Muted Music)',  # Title for the third audio track
        '-metadata:s:a:3', 'title=Bass (Dry)',  # Title for the fourth audio track

        # Add global metadata
        '-metadata', 'title='+title,
        '-metadata', 'artist=PoizenJam',
        '-metadata', 'date='+keys[9],
        '-metadata', 'comment='+keys[8],
        '-metadata', 'description='+custom_desc,
        output_file_1080p]
    )

These metadata for the audio track names displays just fine in VLC and Windows Media Player:



But in Jellyfin the audio track names are completely missing:



Unsure why this would be the case- wondering if the community has any insight?

If it helps, I am running Jellyfin as a Docker container on Windows.